package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import lombok.extern.slf4j.Slf4j;
import org.apache.http.HttpEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

@Service
@Slf4j
public class UserServiceImpl implements UserService {

    public static final String WX_LOGUE="https://api.weixin.qq.com/sns/jscode2session";

    @Autowired
    private WeChatProperties weChatProperties;

    @Autowired
    private UserMapper userMapper;

    /*
    * 微信登陆
    *
    * */
    @Override
    public User wxLogin(UserLoginDTO userLoginDTO) {
        // 获取openid
        String openid = getOpenid(userLoginDTO.getCode());

        // 判断openid是否获取到
        if(openid == null){
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }

        // 是不是一个新用户
        User user = userMapper.getByOpenid(openid);

        // 是，自动完成注册
        if(user==null){
            user = User.builder()
                    .openid(openid)
                    .createTime(LocalDateTime.now())
                    .build();
            userMapper.insert(user);

        }

        // 返回用户对象
        return user;
    }

    private String getOpenid(String code){
        // 调微信服务器接口，获取openid
        Map<String,String> map = new HashMap<>();
        map.put("appid", weChatProperties.getAppid());
        map.put("secret", weChatProperties.getSecret());
        map.put("js_code",code);
        map.put("grant_type","authorization_code");

        String json = HttpClientUtil.doGet(WX_LOGUE, map);
        JSONObject jsonObject = JSON.parseObject(json);
        String openid = jsonObject.getString("openid");

        return openid;
    }
}
